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// This is free and unencumbered software released into the public domain.
//
// Anyone is free to copy, modify, publish, use, compile, sell, or
// distribute this software, either in source code form or as a compiled
// binary, for any purpose, commercial or non-commercial, and by any
// means.
#include "firmware.h"
static void stats_print_dec(unsigned int val, int digits, bool zero_pad)
{
char buffer[32];
char *p = buffer;
while (val || digits > 0) {
if (val)
*(p++) = '0' + val % 10;
else
*(p++) = zero_pad ? '0' : ' ';
val = val / 10;
digits--;
}
while (p != buffer) {
if (p[-1] == ' ' && p[-2] == ' ') p[-1] = '.';
print_chr(*(--p));
}
}
void stats(void)
{
unsigned int num_cycles, num_instr;
__asm__ volatile ("rdcycle %0; rdinstret %1;" : "=r"(num_cycles), "=r"(num_instr));
print_str("Cycle counter ........");
stats_print_dec(num_cycles, 8, false);
print_str("\nInstruction counter ..");
stats_print_dec(num_instr, 8, false);
print_str("\nCPI: ");
stats_print_dec((num_cycles / num_instr), 0, false);
print_str(".");
stats_print_dec(((100 * num_cycles) / num_instr) % 100, 2, true);
print_str("\n");
}
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